US prosecutors and other senior officials who spearheaded the war against drug cartels have quit their jobs to defend Colombian cocaine traffickers, saying their clients are not bad people and that United States drug policy is wrong.

Senior former assistant US attorneys and Drug Enforcement Administration agents are turning years of experience in investigating, indicting and extraditing narcos to the advantage of the alleged traffickers they now represent.

“I’m not embarrassed about the fact that I changed sides,” said Robert Feitel, a Washington-based attorney who used to pursue traffickers and money launderers at the Department of Justice. “And I’m not shy about saying that no one knows better how a prosecutor thinks. That’s what people get when they come to me. There are lots of hidden things to know about these cases.”